环氧丙烷爆燃转爆轰过程反应产物的光谱法确定

采用由增强型ICCD光谱探测器、SpectraPro-275光谱仪和DG535同步控制器组成的瞬态光谱测量系统，在解决了测试系统时间同步问题、弱光探测问题、提高光谱分辨率问题和波长定标及防止误触发问题后，在长4.0 m，内径为0.10 m的爆炸激波管侧窗，拍摄到了持续时间仅为数ms的环氧丙烷爆燃转爆轰过程的曝光时间为1～16 μs的瞬态发射光谱。测量系统的光谱分辨本领达到了0.2 nm 。根据由碳、氢和氧组成的小分子和自由基的特征辐射谱带带头波长值，经过对所测光谱进行分析和辨认，确定了在环氧丙烷的爆燃转爆轰过程中有OH，CH，C₂，C₃，CO，CO₂，CHO和CH₂O这些反应产物出现。这些反应产物的确定，是进一步分析环氧丙烷爆燃转爆轰过程的微观机理必不可少的实验依据。

Determination of Reaction Products of Epoxypropane in the Process of Deflagration to Detonation Transition by Emission Spectroscopy

After solving problems of the synchronization of the measuring system, the detection of weak light, and the avoidance of false trigger signal, the instantaneous emission spectra of epoxypropane in the process of deflagration to detonation transition (DDT) with the exposure time of 1-16 micros and the resolution of 0.2 nm were measured. The spectra were acquired from side windows of an explosion shock tube 0.1 m in inner diameter and 4.0 m in length. The measuring system is made up of an intensified spectroscopic detector ICCD, a SpectraPro-275 spectrograph, and a digital delay generator DG535. By analyzing the spectra obtained, the reaction products OH, CH, C2, C3, CO, CO2, CHO and CH2O were identified according to their characteristic electronic and vibrational bands, which indicates that these molecules and radicals were produced during the DDT process of epoxypropane. The determination of reaction products can provide experimental basis for analyzing and understanding the microscopic mechanism of DDT process.